// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/ozone/demo/renderer_base.h"

#include <cmath>

namespace ui {

namespace {
    const int kAnimationSteps = 240;
} // namespace

RendererBase::RendererBase(gfx::AcceleratedWidget widget, const gfx::Size& size)
    : widget_(widget)
    , size_(size)
{
}

RendererBase::~RendererBase()
{
}

float RendererBase::NextFraction()
{
    float fraction = (sinf(iteration_ * 2 * M_PI / kAnimationSteps) + 1) / 2;

    iteration_++;
    iteration_ %= kAnimationSteps;

    return fraction;
}

} // namespace ui
